App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 34 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 60 px tall
   Next button: 28 px tall
   Back button: 72 px tall (a) Cancel (b) Back (c) Next
2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) light grey on white (d) yellow on white
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 48 px tall
   Start button: 60 px tall
   Back button: 60 px tall
   Send button: 40 px tall (a) Done (b) Start (c) Send (d) Back
7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
8. 8.True or false: a clear word like Save is poor button design. (a) True (b) False
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Done button: 60 px tall
    Save button: 32 px tall
    Help button: 36 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Help button: 64 px tall
    Save button: 44 px tall
    Done button: 40 px tall
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
15. 15.True or false: buttons almost touching is poor button design. (a) False (b) True
16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on pale grey (d) dark blue on black
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
19. 19.True or false: space between buttons is good button design. (a) True (b) False
20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Cancel button: 64 px tall
    Done button: 52 px tall (a) Start (b) Cancel (c) Done
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.True or false: grey text on grey is good button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 72 px tall
    Save button: 28 px tall (a) Save (b) Help (c) Send
25. 25.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) black on yellow
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Back button: 56 px tall
    Done button: 56 px tall
    Next button: 24 px tall (a) Start (b) Next (c) Back (d) Done
27. 27.True or false: a big, easy tap area is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Save button: 60 px tall
    Send button: 28 px tall (a) Send (b) Save (c) Done
33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Next button: 56 px tall
    Back button: 52 px tall (a) Start (b) Back (c) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 56 px tall
    Cancel button: 36 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 32 px tall
    Next button: 68 px tall (a) Cancel (b) Next (c) Send
37. 37.True or false: a tiny 20 px button is poor button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Done button: 44 px tall
    Cancel button: 64 px tall
    Send button: 60 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 44 px tall
    Help button: 44 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 72 px tall
    Start button: 48 px tall
    Cancel button: 60 px tall (a) Start (b) Cancel (c) Back (d) Help

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